iOS 9.0 (build 13A4293g) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2015-07-08T18:38:06Z. The update package is 365.94 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c2b9dc06ded417aaf7266c6dce814a6970dd78dc.zip.